I think the nadir of post-rock has to be Scala. About once a year an enthusiastic review in the Wire tricks me into buying some shitty record, and one mid-90s year it was Scala. Dreadful.
I'm loving the idea of "proto-post-" anything. Proto-post-rock would be rock, right?
The first two Labradford records were good space-float; anything after that is to be strictly avoided. Flying Saucer Attack were mostly great, with the notable exception of the last LP (Mirror?). I'll defend Kinski circa their second album, and they were great live around that time. I thought Moonshake were good, and the male vocalist's songs wouldn't sound out of place next to the Balaclavas. The chick vocalist's follow-on, Laika, were gawdawful. The first two Tortoise albums seemed neat at the time, and in our Mecht Mensch-loving household it was stunning to see Dan Bitney in their midst. Live they seemed way too mannered; I still think of that show fondly, as it was the one time I went to the Antenna during the brief period when it was air conditioned. Mogwai were pretty dull; Ganger were like a lesser Mogwai live, never heard a record by them. I quite like Bardo Pond, but wouldn't call 'em post-rock. I'll stick up for Godspeed You Black Emperor, esp. early on, but they were a band of diminishing returns & any time I think of them, I imagine that any conversation with them would be a horrible jumble of vegan-flavored anti-vaccination rants.
My housemate to Michael Gira @ a Neurosis-organized event: "What'd you think of Neurosis?" Gira: "They're, uh, nice guys."